Bump Verify.Xunit from 31.8.0 to 31.9.0

---
updated-dependencies:
- dependency-name: Verify.Xunit
  dependency-version: 31.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

test/AssemblyMetadata.Generators.Tests/AssemblyMetadata.Generators.Tests.csproj

@@ -46,7 +46,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="[4.4.0]" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageReference Include="MinVer" Version="6.0.0" PrivateAssets="All" />
-    <PackageReference Include="Verify.Xunit" Version="31.8.0" />
+    <PackageReference Include="Verify.Xunit" Version="31.9.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>